Remember that there's a lot of rage at what the administration's done, and Snow is one of the most visible faces. This, plus the recent treatment of Elizabeth Edwards, essentially telling her to just drop everything and sit around waiting for the end, is probably going to push a lot of people into rudeness.
It can be hard to take. But these are contentious times, and as difficult as it is, some of this you're going to have to shrug off. It is hard for me too, so I can say I understand what you're feeling. but you'll find rude people like this everywhere-- Americans are just a little more open about it all.
As DKos has grown (my ID is in the 40,000s, and that's considered an old-timer's number!), so has the range of opinions. Even Markos is subject to a lot of insults now. I too am having trouble with many of the comments and restrict what I read there to certain topics because I know the comments will stay within a certain level of civility.
Eurotrib has an advantage in that we all have to be careful with our comments due to simple language issues. This keeps most comments relatively polite.
(I'm being a sleep-deprived American and posting waaaay too late. @#%!#! insomnia. I'll check in tomorrow.)
I need sleep....